mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-19 06:17:37 +01:00
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P.
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
#include "unwind_i.h"
|
|
|
|
#if 0
|
|
static inline dwarf_loc_t
|
|
linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
|
|
{
|
|
unw_word_t addr = c->sigcontext_addr;
|
|
|
|
switch (c->sigcontext_format)
|
|
{
|
|
case X86_64_SCF_NONE:
|
|
return DWARF_REG_LOC (&c->dwarf, reg);
|
|
|
|
case X86_64_SCF_LINUX_RT_SIGFRAME:
|
|
addr += LINUX_UC_MCONTEXT_OFF;
|
|
break;
|
|
|
|
case X86_64_SCF_FREEBSD_SIGFRAME:
|
|
addr += FREEBSD_UC_MCONTEXT_OFF;
|
|
break;
|
|
}
|
|
|
|
return DWARF_REG_LOC (&c->dwarf, reg);
|
|
|
|
}
|
|
|
|
HIDDEN dwarf_loc_t
|
|
x86_64_scratch_loc (struct cursor *c, unw_regnum_t reg)
|
|
{
|
|
if (c->sigcontext_addr)
|
|
return linux_scratch_loc (c, reg);
|
|
else
|
|
return DWARF_REG_LOC (&c->dwarf, reg);
|
|
}
|
|
#endif
|
|
|
|
HIDDEN int
|
|
tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
|
|
int write)
|
|
{
|
|
dwarf_loc_t loc = DWARF_NULL_LOC;
|
|
unsigned int mask;
|
|
int arg_num;
|
|
|
|
switch (reg)
|
|
{
|
|
|
|
case UNW_X86_64_RIP:
|
|
if (write)
|
|
c->dwarf.ip = *valp; /* also update the RIP cache */
|
|
loc = c->dwarf.loc[RIP];
|
|
break;
|
|
|
|
case UNW_X86_64_CFA:
|
|
case UNW_X86_64_RSP:
|
|
if (write)
|
|
return -UNW_EREADONLYREG;
|
|
*valp = c->dwarf.cfa;
|
|
return 0;
|
|
|
|
case UNW_X86_64_RAX:
|
|
case UNW_X86_64_RDX:
|
|
arg_num = reg - UNW_X86_64_RAX;
|
|
mask = (1 << arg_num);
|
|
if (write)
|
|
{
|
|
c->dwarf.eh_args[arg_num] = *valp;
|
|
c->dwarf.eh_valid_mask |= mask;
|
|
return 0;
|
|
}
|
|
else if ((c->dwarf.eh_valid_mask & mask) != 0)
|
|
{
|
|
*valp = c->dwarf.eh_args[arg_num];
|
|
return 0;
|
|
}
|
|
else
|
|
loc = c->dwarf.loc[(reg == UNW_X86_64_RAX) ? RAX : RDX];
|
|
break;
|
|
|
|
case UNW_X86_64_RCX: loc = c->dwarf.loc[RCX]; break;
|
|
case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break;
|
|
|
|
case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break;
|
|
case UNW_X86_64_RSI: loc = c->dwarf.loc[RSI]; break;
|
|
case UNW_X86_64_RDI: loc = c->dwarf.loc[RDI]; break;
|
|
case UNW_X86_64_R8: loc = c->dwarf.loc[R8]; break;
|
|
case UNW_X86_64_R9: loc = c->dwarf.loc[R9]; break;
|
|
case UNW_X86_64_R10: loc = c->dwarf.loc[R10]; break;
|
|
case UNW_X86_64_R11: loc = c->dwarf.loc[R11]; break;
|
|
case UNW_X86_64_R12: loc = c->dwarf.loc[R12]; break;
|
|
case UNW_X86_64_R13: loc = c->dwarf.loc[R13]; break;
|
|
case UNW_X86_64_R14: loc = c->dwarf.loc[R14]; break;
|
|
case UNW_X86_64_R15: loc = c->dwarf.loc[R15]; break;
|
|
|
|
default:
|
|
Debug (1, "bad register number %u\n", reg);
|
|
return -UNW_EBADREG;
|
|
}
|
|
|
|
if (write)
|
|
return dwarf_put (&c->dwarf, loc, *valp);
|
|
else
|
|
return dwarf_get (&c->dwarf, loc, valp);
|
|
}
|
|
|
|
HIDDEN int
|
|
tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
|
|
int write)
|
|
{
|
|
return -UNW_EBADREG;
|
|
}
|